When people vanish without warning or without a trace, their disappearance is often blamed on evil spirits. These victims often come back to the world many years later, profoundly changed by the traumatic experience. Sometimes, however, a person never returns after going missing. In these cases, the victim is often said to have been eaten by an oni. Oni hitokuchi describes such a situation, where the victim was gobbled up in a single bite, never to be seen again.